Organization and Description of Business - Additional Information (Details)		6 Months Ended	11 Months Ended
	Aug. 02, 2019 USD ($)	Jun. 30, 2020 USD ($) Segment	Jun. 30, 2020 USD ($) shares	Dec. 31, 2019 USD ($)
Organization And Description Of Business [Line Items]
Entity date of incorporation		Aug. 06, 2013
Entity incorporation, State		DE
Number of operating segment | Segment		1
Accumulated deficit		$ (154,778,000)	$ (154,778,000)	$ (103,105,000)
Open Market Sale Agreement
Organization And Description Of Business [Line Items]
Stock issued during period, shares, new issues | shares			834,368
Proceeds from the issuance of common stock		$ 24,094,000	$ 48,100,000
Maximum aggregate sales price of shares to be issued under open market sale agreement	$ 100,000,000.0
Open Market Sale Agreement | Maximum
Organization And Description Of Business [Line Items]
Agency commission as percentage from proceeds from sale of common stock gross	3.00%